Property Standard Units
150g Pot Life ASTM D2471minutes
500g Pot Life ASTM D2471minutes
Viscosity MixedASTM D2196 cP
Viscosity (resin)ASTM D2196 cP
Viscosity (hardener)ASTM D2196 cP
COMBINED FEATURES Method Resin:Hardener
Weight 7.40:1
Weight Range 8.67:1 – 6.85:1
Volume 6.30:1
Volume Range 7.41:1 – 5.62:1
State Units 72 F (22 C)
Resin lb/gal (g/cc)10.3 (1.23)
Hardener lb/gal (g/cc)8.85 (1.06)
Rev 2/Jan 2023
2023 Gougeon Brothers, Inc.
Starting Lot # 1873003A Test specimens were neat epoxy (without fiber reinforcement).
Typical values, not to be construed as specification.
100:13.5 – 100:17.8
DENSITY
100:15.9
HIGH-TEMP SURFACE COAT EPOXY
MIX RATIO
100:11.5 – 100:14.6
HANDLING PROPERTIES
Resin:Hardener
100:13.5
Technical Data
72 F (22 C)
160
150
16,000
33,000
900
High-temperature, high-performance epoxy
surface coat formulation for synthetic composite
parts and tooling manufacturing. Black in color.
T
gas high as 270 F (132 C) with proper post-
cure. Provides excellent temperature stability and
great part cosmetics.
Slow cure speedprovides 2 to 3 hours working
time at 72 F (22 C). A second application can be
applied while the first coat is tacky, which is
typically after 6-8 hours. After 24 hours cure at
72 F (22 C) the laminating process can begin.
Medium Viscosity enables brush application and
air release. Easily applied with a short bristle
brush.
Thixotropedto prevent runs and sags at a
thickness of 10-12 mils.
Elevated temperature cure is required. The
surface coat and laminate should be post cured
together. See chart for post cure information.
This datasheet is valid starting resin lot number,
HTP 187
HTP288
Hardness ASTM D2240 Type D
Compression Yield ASTM D695 psi (MPa)
Tensile Strength ASTM D638 psi (MPa)
Tensile Modulus ASTM D638 psi (GPa)
Tensile Elongation ASTM D638 %
Flexural Strength ASTM D790 psi (MPa)
Flexural Modulus ASTM D790 psi (GPa)
Tg DMA Peak Tan Delta ASTM E1640
1
F ( C)
Tg DMA Onset Storage ModulusASTM E1640
1
F ( C)
Tg DSC Onset 1st Heat ASTM E1356 F ( C)
Heat Deflection TemperatureASTM D648 F ( C)
APPLICATION TIPS
Stir resin before use; some settling may occur.
Always evaluate mold release on a test panel that is characterized with your post-cure schedule.
Apply product using stiff bristle brush. Cut bristles to half of their original length to increase brush stiffness.
When applying, brush in an alternating pattern of 0 and 90 degrees, building to a thickness of 10-12 mils. A total of 20-24 mils of surface coat is recommended before laminating.
Allow surface coat to cure prior to lamination. Wash with water and a Scotch-Brite pad to remove amine blush.
To repair finished molds, grind away damaged surface coat and grind a vee into any cracks. Sand areas with 80-grit sandpaper and fill with surface coat. Post-cure as required. 1 mixed gallon of HTP-187/HTP-288 covers approximately 60 sq. ft. with a final thickness of 24 mils (2 applications).
1
1 Hz, 3 C per minute.
Starting Lot # 1873003A
Post-cure 140 F (60 C) x 2 hr + 275 F (135 C) x 12 hr
with ramp rates no greater than 12 F/hr (6.7 C/hr), to
achieve maximum properties. For larger parts,
additional dwells may be required.
297 (147)
268 (131)
291 (144)
247 (119)
Property Standard Units
RT + 140 F (60 C) x 2hr +
275 F (135 C) x 12hr
2
Store PRO-SET Epoxy resins and hardeners at room temperature in sealed containers until shortly before use. As with many high-performance epoxy resins, repeated exposure to low temperatures during storage may cause
the resin or hardener to crystallize. If this occurs, warm the resin or hardener to 125 F and stir to dissolve crystals. Hardeners may form carbamation when exposed to CO2 and moisture in the atmosphere for extended periods
of time. Prevent carbamation by protecting hardeners from exposure until immediately prior to processing.
4.10E+05(2.8)
THERMAL PROPERTIES
7,900(54)
92
21,000(140)
0.9
HTP 187~HTP 288
HIGH-TEMP SURFACE COAT EPOXY
3,700(26)
5.60E+05(3.9)
POST-CURE SCHEDULEMECHANICAL PROPERTIES
Property Standard Units
RT + 140 F (60 C) x 2hr +
275 F (135 C) x 12hr
10
30
50
70
90
110
130
50
100
150
200
250
300
0510152025303540
Temperature ( C)
Temperature ( F)
Time (Hours)